From: Motohiro KOSAKI <kosaki.motohiro@...>
Date: 2011-06-29T22:44:15+09:00
Subject: [ruby-core:37665] [Ruby 1.9 - Bug #3919][Closed] Ruby in PowerTOP - too many CPU wakeups


Issue #3919 has been updated by Motohiro KOSAKI.

Status changed from Assigned to Closed

Fixed by r32244.

 

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Bug #3919: Ruby in PowerTOP - too many CPU wakeups
http://redmine.ruby-lang.org/issues/3919

Author: Suraj Kurapati
Status: Closed
Priority: Normal
Assignee: Koichi Sasada
Category: core
Target version: 1.9.3
ruby -v: ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-linux]


=begin
 Hello,
 
 Ruby causes too many CPU wakeups according to Intel's PowerTOP tool.
 For example, this simple I/O bound program causes 99 wakeups/second
 and accounts for 14% of the CPU wakeups on my system:
 
   ruby -e gets
 
 In contrast, when I run `python` (2.6.5) and make it wait for I/O, it
 does not even appear in PowerTOP because it causes so little wakeups.
 
 Please make Ruby more power-efficient!  Thanks for your consideration.
=end



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